An infrared spectroscopy film pressing device and its film pressing method

Abstract

The present invention discloses an infrared spectrum pressing film device, and the key points are as follows: it includes a base assembly, a column, a driving device, a temperature-controllable upper pressing block, a nitrogen protection device and a control device. The base assembly includes a temperature-controllable base and a film seat. The column is vertically and fixedly arranged on the middle and rear part of the fixed seat. The film seat is detachably arranged on the temperature-controllable base. The driving device is arranged on the column and above the film seat, and the temperature-controllable upper pressing block is driven to move by the driving device. The nitrogen protection device is used to form a gas protection above the film seat. The control device is provided with a temperature controller and a gas flow controller. The temperature controller is used to control the temperature of the temperature-controllable base and the temperature of the temperature-controllable upper pressing block, and the gas flow controller is used to control the gas output volume of the nitrogen protection device.

Description

Technical Field

[0001] The present invention relates to the technical field of material detection, and specifically to a device and a method for laminating plastics. Background Art

[0002] Recycled plastics are the reuse of plastics, which are obtained by pre-treating waste plastic raw materials, melting and pelletizing, modifying and other physical or chemical methods. The prospects of pelletized plastics are broad. Although they can turn waste into treasure, some manufacturers will pass off inferior goods as good ones and use recycled plastic raw materials instead of new materials. Therefore, it is necessary to identify plastics. The commonly used method for identifying plastic grades is infrared spectroscopy. Infrared spectroscopy is an important analysis method in polymer materials and is often used to qualitatively judge the material of materials. Infrared spectroscopy irradiates a beam of infrared rays with different wavelengths onto the molecules of a substance, and certain specific wavelengths of infrared rays are absorbed to form the infrared absorption spectrum of this molecule. "Since each molecule has a unique infrared absorption spectrum determined by its composition and structure, the structure of the molecule can be analyzed and identified based on this. Before detection, plastic particles need to be pressed into a film shape (hereinafter referred to as film lamination), and then the film is detected. Summary of the Invention

[0003] The purpose of the present invention is to provide an infrared spectroscopy film laminating device and a film laminating method for plastic films used for infrared spectroscopy projection, which have a simple structure.

[0004] The basic technical solution for achieving the first purpose of the present invention is: an infrared spectroscopy film laminating device, the structural characteristics of which are: including a base assembly, a column, a driving device, a temperature-controlled upper pressing block, a nitrogen protection device, and a control device. The base assembly includes a temperature-controlled base and a film holder. The column is vertically and fixedly arranged at the middle and rear part of the fixed seat. The film holder is detachably arranged on the temperature-controlled base. The driving device is arranged on the column, above the film holder, and the temperature-controlled upper pressing block is driven to move by the driving device. The nitrogen protection device is used to form a gas protection above the film holder. The control device is provided with a temperature controller and a gas flow controller. The temperature controller is used to control the temperature of the temperature-controlled base and the temperature-controlled upper pressing block, and the gas flow controller is used to control the gas output volume of the nitrogen protection device.

[0005] Based on the above basic technical solution, the technical solution is: a dovetail groove with an opening forward is provided at the upper front part of the temperature-controlled base of the base assembly. The shape of the film holder corresponds to the shape of the dovetail groove on the temperature-controlled base, and the film holder is slidably arranged in the dovetail groove of the temperature-controlled base, and the upper surface of the film holder is flush with the upper surface of the temperature-controlled base.

[0006] Based on the above corresponding technical solution, the technical solution is: an installation handle is provided on the film holder of the base assembly.

[0007] Based on the above respective corresponding technical solutions, the technical solution is as follows: The driving device includes a gearbox, a rack, a return spring, and an operating wrench. The gearbox is fixedly arranged on the column. The rack is vertically arranged in the gearbox in the up-and-down direction and meshes with the power output gear in the gearbox. The return spring is suspended on the gearbox in the up-and-down direction, and its lower end is connected to the rack. The return spring is in a stretched state. The operating wrench is used to provide input power to the gearbox to make the power output gear in the gearbox rotate, thereby driving the rack to move downward or upward. The temperature-controllable upper pressing block is fixedly arranged on the lower end of the rack of the driving device.

[0008] Based on the above respective corresponding technical solutions, the technical solution is as follows: It further includes a mold plate. The thickness of the mold plate is equal to the thickness of the corresponding plastic film sample to be pressed. A diaphragm hole penetrating through the upper and lower parts is provided in the middle of the mold plate.

[0009] The basic technical solution for achieving the second object of the present invention is: A film pressing method for an infrared spectroscopy film pressing device, which has the following steps:

[0010] First, install the diaphragm seat into the dovetail groove of the temperature-controllable base, then select a mold plate with the same thickness as the film to be pressed, and place the mold plate on the diaphragm seat of the base assembly; then place the plastic particles to be pressed into a film into the diaphragm hole of the mold plate, and the particle size of the plastic particles is greater than the thickness of the mold plate.

[0011] Second, according to the plastic sample, select the corresponding temperature, and set the temperatures of the temperature-controllable base and the temperature-controllable upper pressing block through the temperature controller of the control device, and first heat the sample by the temperature-controllable base.

[0012] Third, control the nitrogen protection device through the gas flow controller of the control device, and blow nitrogen towards the sample from the air outlet pipe to make the sample melt under nitrogen protection.

[0013] Fourth, when the sample is in a semi-molten state, make the rack move downward through the operating wrench of the driving device, so that the temperature-controllable upper pressing block presses the sample into a film from above; keep the temperature-controllable upper pressing block in contact with the upper surface of the mold plate for 2 to 3 seconds; then release the operating wrench of the driving device, and make the rack move upward and reset through the return spring.

[0014] Fifth, then draw out the diaphragm seat from the temperature-controllable base, and place the diaphragm seat and the film sample above at room temperature and cool it down to room temperature under a nitrogen atmosphere.

[0015] The present invention has the following beneficial effects: (1) The infrared spectrum film pressing device of the present invention has a simple structure. The base assembly is provided with a temperature-controlled base, and the temperature of the temperature-controlled base can be controlled through the temperature controller of the control device to adapt to the melting temperature requirements of different plastics. At the same time, the temperature of the temperature-controlled upper pressing block can be controlled through the temperature controller of the control device to ensure that the temperatures on the upper and lower sides are the same when pressing the sample into a film, which is beneficial to improving the pressing quality.

[0016] (2) The diaphragm seat of the base assembly of the infrared spectrum film pressing device of the present invention can be quickly disassembled and arranged on the temperature-controlled base, which is convenient for removing the pressed film and then naturally cooling it under nitrogen protection.

[0017] (3) The infrared spectrum film pressing device of the present invention is provided with a driving device, and the driving device adopts spring reset, which is beneficial to improving efficiency. After the operator loosens the operation wrench, he can remove the pressed film, which is beneficial to quickly entering the next step, thereby improving the reliability of the subsequent detection data.

[0018] (4) The infrared spectrum film pressing device of the present invention is provided with a nitrogen protection device. Under nitrogen protection, it is possible to avoid oxidation of the sample when heated in air, form oxide peaks, reduce the interference of oxides, and is beneficial to improving the reliability of subsequent data detection.

[0019] (5) The thickness of the mold plate of the infrared spectrum film pressing device of the present invention is equal to the thickness of the corresponding plastic film sample to be pressed. Therefore, the thickness of the film pressed by using different thickness mold plates is the thickness of the mold plate, ensuring that the films pressed by the same thickness mold plate have the same thickness, which is beneficial to ensuring the unity of detection and improving data accuracy.

[0020] (6) The film pressing method of the infrared spectrum film pressing device involved in the present invention melts the plastic sample through the temperature-controlled base, and then presses it through the temperature-controlled upper pressing block at the same temperature. The thickness consistency of the pressed plastic film sample is good, and through nitrogen protection, it is possible to avoid oxidation of the sample when heated in air, form oxide peaks, reduce the interference of oxides, etc. It is suitable for aspects such as recycled plastic detection, uniformity inspection, and rapid inspection, and has a wide range of applications. Brief Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of the infrared spectrum film pressing device of the present invention.

[0022] Figure 2 is Figure 1 the left view schematic diagram of

[0023] Figure 3 is Figure 1 the top view schematic diagram of

[0024] Figure 4 is fromFigure 1 Schematic diagram when observed from the upper right front.

[0025] The reference numerals in the accompanying drawings are as follows:

[0026] Base assembly 1, temperature-controllable base 1-1, dovetail groove 1-11, diaphragm seat 1-2, mounting handle 1-21,

[0027] Column 2,

[0028] Driving device 3, gearbox 3-1, rack 3-2, return spring 3-3, operating wrench 3-4,

[0029] Temperature-controllable upper pressing block 4,

[0030] Nitrogen protection device 5,

[0031] Control device 6,

[0032] Mold plate 10, diaphragm hole 10-1. Detailed implementation manners

[0033] In order to make the content of the present invention easier to be clearly understood, the present invention will be further described in detail below according to specific embodiments in conjunction with the accompanying drawings. The description of the orientation of the present invention is carried out in accordance with Figure 1 the orientation shown, that is, Figure 1 the up, down, left and right directions shown are the up, down, left and right directions described, Figure 1 the direction facing is the front, and the direction away from Figure 1 is the rear.

[0034] It should be noted that: similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of the present invention, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0035] It should be understood that the terms "upper", "lower", "inner", "outer", etc. indicating the orientation or position relationship are based on the position relationship shown in the drawings, and are only for the convenience of describing the present invention or simplifying the description, rather than indicating a specific orientation that must be possessed.

[0036] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0037] (Example 1)

[0038] See Figures 1 to 4 , the infrared spectrum pressing film device of the present invention includes a base assembly 1, a column 2, a driving device 3, a temperature-controllable upper pressing block 4, a nitrogen protection device 5, a control device 6 and a die plate 10.

[0039] The base assembly 1 includes a temperature-controllable base 1-1 and a diaphragm seat 1-2. The column 2 is vertically and fixedly arranged on the middle rear part of the fixed seat 1-1. A dovetail groove 1-11 with an opening forward is provided on the upper front part of the temperature-controllable base 1-1. The shape of the diaphragm seat 1-2 corresponds to the shape of the dovetail groove 1-11 on the temperature-controllable base 1-1. The diaphragm seat 1-2 is slidably arranged in the dovetail groove 1-11 of the temperature-controllable base 1-1, and the upper surface of the diaphragm seat 1-2 is flush with the upper surface of the temperature-controllable base 1-1. An installation handle 1-21 is provided on the diaphragm seat 1-2 to facilitate the extraction of the diaphragm seat 1-2 from the dovetail groove 1-11 of the temperature-controllable base 1-1.

[0040] The driving device 3 includes a gearbox 3-1, a rack 3-2, a return spring 3-3 and an operation wrench 3-4. The gearbox 3-1 is fixedly arranged on the column 2, above the dovetail groove 1-11 of the temperature-controllable base 1-1. The rack 3-2 is vertically arranged in the gearbox 3-1 along the up and down direction and meshes with the power output gear in the gearbox 3-1. The return spring 3-3 is suspended on the gearbox 3-1 along the up and down direction, and its lower end is connected to the rack 3-2. The return spring 3-3 is in a stretched state and is used to reset the rack 3-2 to move upward. The operation wrench 3-4 is used to provide input power to the gearbox 3-1 to make the power output gear in the gearbox 3-1 rotate, thereby driving the rack 3-2 to move downward or upward.

[0041] The temperature-controllable upper pressing block 4 is fixedly arranged at the lower end of the rack 3-2 of the driving device 3.

[0042] The nitrogen protection device 5 is provided with two air outlet pipes. The two air outlet pipes blow nitrogen gas from the upper left rear and upper right rear respectively towards the projection of the temperature-controllable upper pressing block 4 on the upper surface of the temperature-controllable base 1-1 to form gas protection. The control device 6 is arranged on the left side of the temperature-controllable base 1-1 of the base assembly 1. The control device 6 is provided with a temperature controller and a gas flow controller. The temperature controller is used to control the temperature of the temperature-controllable base 1-1 and the temperature of the temperature-controllable upper pressing block 4, and the gas flow controller is used to control the air output volume of the nitrogen protection device 5.

[0043] The mold plate 10 is a thin steel plate. There are several mold plates 10, and the thickness of each mold plate 10 is equal to the thickness of the corresponding plastic film sample to be pressed. Therefore, the thickness of the film pressed by using mold plates 10 of different thicknesses is the thickness of the mold plate 10. A diaphragm hole 10-1 penetrating through the upper and lower parts is provided in the middle of the mold plate 10.

[0044] The method for film pressing of the infrared spectrum film pressing device of the present invention includes the following steps:

[0045] I. Install the diaphragm seat 1-2 into the dovetail groove 1-11 of the temperature controllable base 1-1, then select a mold plate 10 with the same thickness as the film to be pressed, and place the mold plate 10 on the diaphragm seat 1-2 of the base assembly 1; then place the plastic particles to be pressed into a film into the diaphragm hole 10-1 of the mold plate 10, and the particle size of the plastic particles is greater than the thickness of the mold plate 10.

[0046] II. According to the plastic sample, select the corresponding temperature, and set the temperatures of the temperature controllable base 1-1 and the temperature controllable upper pressing block 4 through the temperature controller of the control device 6, and first heat the sample by the temperature controllable base 1-1.

[0047] III. Control the nitrogen protection device 5 through the gas flow controller of the control device 6, and blow nitrogen towards the sample through the air outlet pipe, so that the sample melts under nitrogen protection.

[0048] IV. When it is visually observed that the sample is in a semi-molten state, or when the lower part of the plastic particles becomes soft and melts when pricked with a metal rod, make the rack 3-2 move downward through the operating wrench 3-4 of the driving device 3, so that the temperature controllable upper pressing block 4 presses the sample into a film from above, and keep the temperature controllable upper pressing block 4 in contact with the upper surface of the mold plate 10 for 2 to 3 seconds. Then loosen the operating wrench 3-4 of the driving device 3, and make the rack 3-2 move upward and reset through the return spring 3-3.

[0049] V. Then draw out the diaphragm seat 1-2 from the temperature controllable base 1-1, and place the diaphragm seat 1-2 and the upper film sample at room temperature and cool them to room temperature under a nitrogen atmosphere.

[0050] In the above specific embodiments, the purpose, technical solution and beneficial effects of the present invention are further described in detail. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An infrared spectroscopy film pressing device, characterized in that: It includes a base assembly, a column, a driving device, a temperature-controllable upper pressing block, a nitrogen protection device and a control device; the base assembly includes a temperature-controllable base and a diaphragm seat; the column is vertically and fixedly arranged on the middle rear part of the fixed seat; the diaphragm seat is detachably arranged on the temperature-controllable base; the driving device is arranged on the column, above the diaphragm seat, and the temperature-controllable upper pressing block is driven to move by the driving device; the nitrogen protection device is used to form a gas protection above the diaphragm seat; the control device is provided with a temperature controller and a gas flow controller, the temperature controller is used to control the temperature of the temperature-controllable base and the temperature-controllable upper pressing block, and the gas flow controller is used to control the gas output volume of the nitrogen protection device; a dovetail groove with an opening forward is arranged on the upper front part of the temperature-controllable base of the base assembly; the shape of the diaphragm seat corresponds to the shape of the dovetail groove on the temperature-controllable base, the diaphragm seat is slidably arranged in the dovetail groove of the temperature-controllable base, and the upper surface of the diaphragm seat is flush with the upper surface of the temperature-controllable base; an installation handle is arranged on the diaphragm seat of the base assembly.

2. The infrared spectrum laminating device according to claim 1, wherein: The driving device includes a gear box, a rack, a return spring and an operation wrench; the gear box is fixedly arranged on the column; the rack is vertically arranged in the gear box along the up and down direction and meshes with the power output gear in the gear box, the return spring is suspended on the gear box along the up and down direction, and its lower end is connected to the rack, and the return spring is in a stretched state; the operation wrench is used to provide input power to the gear box to make the power output gear in the gear box rotate, so as to drive the rack to move downwards or upwards; the temperature-controllable upper pressing block is fixedly arranged on the lower end of the rack of the driving device.

3. The infrared spectrum pressing film device according to claim 1, wherein: It also includes a mold plate; the thickness of the mold plate is equal to the thickness of the corresponding plastic film sample to be pressed; a diaphragm hole penetrating through the upper and lower parts is arranged in the middle of the mold plate.

4. A film pressing method for an infrared spectrum film pressing device, characterized in that: It has the following steps:

1. Install the diaphragm seat into the dovetail groove of the temperature-controllable base, then select a mold plate with the same thickness as the film to be pressed, and place the mold plate on the diaphragm seat of the base assembly; then place the plastic particles to be pressed into a film into the diaphragm hole of the mold plate, and the particle size of the plastic particles is greater than the thickness of the mold plate.

2. According to the plastic sample, select the corresponding temperature, and set the temperatures of the temperature-controllable base and the temperature-controllable upper pressing block through the temperature controller of the control device, and first heat the sample by the temperature-controllable base.

3. Control the nitrogen protection device through the gas flow controller of the control device, and blow nitrogen towards the sample from the air outlet pipe, so that the sample melts under nitrogen protection.

4. When the sample is in a semi-molten state, make the rack move downwards through the operation wrench of the driving device, so that the temperature-controllable upper pressing block presses the sample into a film from above; keep the temperature-controllable upper pressing block in contact with the upper surface of the mold plate for 2 to 3 seconds; then release the operation wrench of the driving device, and make the rack move upwards and reset through the return spring.

5. Then draw out the diaphragm seat from the temperature-controllable base, and place the diaphragm seat and the thin film sample on it at room temperature and cool it down to room temperature under a nitrogen atmosphere.

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